OS4K — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Belgium

Receiver-side FT8 activity involving OS4K, decoded by SO8OO in southeastern Poland. 2,171 related FT8 messages, observed on 60m, 40m, 20m, across 73 UTC dates. Heard between 2026-05-27 and 2026-08-23.

These are automated observations at the SO8OO receiver, not the station's official logbook. Times are UTC. Decoder S/N describes messages received at SO8OO; inferred entity and location data may be inaccurate for portable, remote or special-event operation.

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Overview

2,171

Related messages

CQ messages

UTC dates heard

-9 dB

Mean decoder S/N

Bands

40m 60m 20m

First seen: 2026-05-27
Last seen: 2026-08-23 21:38 UTC

Frequent QSO partners observed at SO8OO

Stations OS4K worked most often, as logged from our receiver:

II3DRC · Italy ×3 OK4SD · Czech Republic ×2 9A2L · Croatia ×2 DL9KM · Fed. Rep. of Germany ×2 DL6MRM · Fed. Rep. of Germany ×2 SP2LPI · Poland ×2 ER3ZW · Moldova ×2 R2ASV · European Russia ×2 F1JPG · France ×2 IW3HXR · Italy ×2 OV1T · Denmark ×2 IK6GPZ · Italy ×2

Activity Heatmap

Observed FT8 exchanges

S/N cells show: decoded at SO8OO / report transmitted by the counterpart. An observed exchange is not a QSL or an official logbook confirmation.

Time UTC	Band	OS4K S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-23 23:37	60m	-21 / -19	DF4FS	-18 / -	4	✓ Closing observed
08-23 23:32	60m	-20 / -	KK2I	- / -11	2	Partial capture
08-23 22:33	60m	- / -15	SQ2JG	+9 / -	2	✓ Closing fragment
08-23 22:30	60m	- / -3	ON6ZK	-12 / -	2	✓ Closing fragment
08-23 21:43	60m	-20 / -2	LA1HU	-2 / -3	3	✓ Full exchange observed
08-23 21:13	60m	- / -11	G0LZX	-7 / -	2	✓ Closing fragment
08-23 20:56	60m	- / -18	SP7ROM	+6 / -	2	Partial capture
08-23 20:45	60m	- / -5	DL3RDO	-8 / -	2	✓ Closing fragment
08-23 20:21	60m	- / 0	OZ1LGJ	-8 / -	2	✓ Closing fragment
08-23 20:00	60m	- / -1	PA4A	-9 / -	2	✓ Closing fragment
08-23 19:59	60m	- / -16	G4FHL	-18 / -	2	✓ Closing fragment
08-23 19:56	60m	- / -9	SM7WNM	-20 / -	2	✓ Closing fragment
08-23 19:14	60m	- / 0	DL5SBY	-2 / -	3	✓ Closing fragment
08-23 19:13	60m	- / -15	HA5AZD	-10 / -	2	✓ Closing fragment
08-22 02:39	40m	-6 / -21	RK3AW	-8 / -19	6	Partial capture
08-22 02:37	40m	-9 / -	UA3DPM	- / +9	3	Partial capture
08-22 02:35	40m	-15 / -	RW9WJ	- / -10	4	Partial capture
08-22 02:33	40m	-10 / -	TA5DOB	- / -13	3	Partial capture
08-22 02:31	40m	-10 / -	KC3LVG	- / -3	4	Partial capture
08-22 02:29	40m	-10 / -	KC4DPT	- / -1	3	Partial capture
08-22 02:27	40m	-12 / -	WB2ASJ	- / -7	3	Partial capture
08-22 02:25	40m	-10 / -	TA3NK	- / +8	2	Partial capture
08-22 02:24	40m	-9 / -	DC9GT	- / +4	3	✓ Closing fragment
08-22 02:22	40m	-9 / -	HI3RRR	- / -17	3	Partial capture
08-22 02:21	40m	-9 / -	OA4ENG	- / -6	2	Partial capture
08-22 02:19	40m	-10 / -	W3UCA	- / -14	2	Partial capture
08-22 02:16	40m	-8 / -	R4HNW	- / 0	4	Partial capture
08-22 02:14	40m	-10 / -	K9EL	- / +6	2	Partial capture
08-22 02:12	40m	-9 / -	KF4AAF	- / -15	3	Partial capture
08-22 02:10	40m	-7 / -	N1MIE	- / -12	2	Partial capture
08-22 02:08	40m	-11 / -	W5PF	- / -7	3	Partial capture
08-22 02:06	40m	-14 / -	RM1F	- / +2	2	Partial capture
08-22 02:02	40m	-11 / -	AK4BB	- / -6	2	Partial capture
08-22 01:58	40m	-11 / -	NI3V	- / -10	4	Partial capture
08-22 01:46	40m	-12 / -	KA2BUG	- / -3	2	Partial capture
08-22 01:43	40m	-12 / -	TA3NK	- / +1	2	Partial capture
08-22 01:14	40m	-12 / -	G1CEC	- / +7	2	Partial capture
08-22 01:12	40m	-11 / -	R3ST	- / +2	2	Partial capture
08-22 00:59	40m	- / -12	OH2MA	-5 / -	5	✓ Closing fragment
08-22 00:43	40m	-13 / -	KC4ZA	- / -15	2	Partial capture
08-22 00:14	40m	- / -21	NZ3M	-7 / -	3	✓ Closing fragment
08-22 00:10	40m	-17 / -	N4ILE	- / +2	2	Partial capture
08-22 00:07	40m	-16 / -12	IZ3GOO	+10 / -	3	✓ Full exchange observed
08-21 23:56	40m	-12 / -	N1SK	- / -4	2	Partial capture
08-21 23:55	40m	-13 / -	TA2L	- / -10	2	Partial capture
08-21 23:42	40m	-8 / -	N8LGP	- / -16	2	Partial capture
08-21 22:55	40m	- / -15	UT2PC	+10 / -	2	Partial capture
08-21 20:41	40m	-16 / -7	DL7HS	+10 / +6	3	✓ Full exchange observed
08-21 20:39	40m	-15 / -	ON4IQ	- / +5	3	Partial capture
08-21 20:37	40m	-14 / -	CT2HEX	- / -1	2	Partial capture

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

60m

UTC    dB Audio  Message
214430  -2 1226  OS4K LA1HU 73
214630  -4  998  OS4K II7MGXX R-12
223045 -13 1729  OS4K ON6ZK R-03 (x2)
223300  +8  611  OS4K SQ2JG R-15 (x2)
224200 -10 1030  OS4K II7MGML R-18
233245 -20 1577  KK2I OS4K -11 (x2)
233700 -22 1360  OS4K DF4FS JN48 (x2)
233745 -21 1577  DF4FS OS4K RR73
233800 -16 1360  OS4K DF4FS 73
001545 -24 1577  WA2LAN OS4K -05
001745 -24 1577  K8VEB OS4K -17

40m

UTC    dB Audio  Message
023445 -10 1780  TA5DOB OS4K -13
023515 -14 1780  RW9WJ OS4K -10 (x4)
023715  -8 1780  UA3DPM OS4K +09 (x3)
023915  -7 1780  RK3AW OS4K -19
023930 -10 1155  OS4K RK3AW R-21
023945  -6 1780  RK3AW OS4K -19
024000  -6 1155  OS4K RK3AW R-25
024015  -7 1780  RK3AW OS4K -19 (x2)
024115 -11 1780  IK2YYO OS4K -01

20m

UTC    dB Audio  Message
131145 -10 1709  OZ/KD0NDU OS4K +02
131200 -15 1950  OS4K OZ/DL1JGR R+14
131615 -18 1709  UX7UU OS4K -04 (x3)
131815 -14 1710  G5JCC OS4K -10
132845 -21 1710  DB1AD OS4K +08
132900  -5 1717  OS4K DB1AD R-12
133615 -18 1709  F8KIC/P OS4K +21
143745 -14 1710  OS4K <...> R-24
144645 -15 1343  OS4K DL4DO/QRP R-17 (x2)
144830 -17 1709  IZ7WEM OS4K -05
145145 -18 1709  DL4OAN OS4K RR73
145215 -16 1709  RA0AM OS4K -08

Decoder S/N history by band

Daily averages across messages associated with this profile as decoded at SO8OO.